Rotary brush



April 9, 1963 R. R. RADINSE 3,084,367

ROTARY BRUSH Filed Sept. 6, 1956 2 Sheets-Sheet 1 IN VEN TOR. FZ/FJLFH 1? 7675/7755 B M M i MM April 9, 1963 R. R. RADINSE 3,084,357

ROTARY BRUSH Filed Sept. 6, 1956 2 Sheets-Sheet 2 IN VEN TOR. .FZ/FJLFH E F/717F755 B QQJLQM 3,084,367 RGTARY BRUSH Rudolph R. Radinse, Avon Lake, (lhio; Rita Gail, executrix of the estate of Rudolph R. Radinse, deceased, as-

signor to The Manufacturers Brush Company, Cleveland, Ohio, a corporation of Ghio Filed Sept. 6, 1956, Ser. No. 608,233 9 Claims. ((31. 15-181) This invention relates to rotary brushes and especially to rotary brushes of large size. The invention is especially useful in the construction of assemblies of rotary brushes of great axial extent, such as are used for sweeping pavements or floors or polishing or cleaning large fiat surfaces of metal, wood or other materials.

A very satisfactory rotary brush having wire bristles is shown in my Patent No. 1,920,667 dated August 1, 1933. Where, however, it is desired to mount a multiplicity of such brushes on a common shaft, the brushes are packed so closely together that their bristles may not yield sufficiently in use unless the brush units are held in spaced apart relation by spacing collars.

It is an object og the present invention to provide a brush unit which may be readily mounted upon a brush arbor in a plane oblique to the axis of the arbor with other similar brush units in axially spaced apart parallel relation.

A further object of the invention is to use formed side discs in a brush for positioning the brush on a carrier shaft at an oblique angle thereto.

It is a further object to provide a brush unit adapted to space adjacent units in the most efricient relation without the use of extra spacing means, such as collars.

It is a further object of the invention to provide such a brush with means for preventing rotation of the brush independent of its arbor.

These and other objects will appear from the followering description and the accompanying drawings.

Of the drawings:

FIG. 1 is a side view of a brush unit constructed in accordance with and embodying the invention;

FIG. 2 is a sectional view of the brush unit taken on line 2-2 of FIG. 1, also showing a section of an arbor on which the brush is mounted together with adjacent similar brush units; and

FIG. 3 is a face view, partly broken away and in section, of a brush arbor with a multiplicity of brush units mounted thereon in side by side relation, only a few of the brush units being shown in place.

Referring to the drawings, the numeral designates a brush unit comprising a central bristle mounting anchor ring or frame 11 of sheet metal having a circumferential row of spaced axial projections l2, 13 on each end face for anchoring the loops 14 of twisted strands of wire or other material which comprises the bristles 15 extending radially outward to the periphery of the brush unit. Each brush unit also includes a pair of formed metal discs 16, 17, usually made as stampings, and arranged to flank the anchor ring and embrace the looped portions of the bristle strands. Each formed metal disc comprises a cupped hub portion having a radial bottom portion 18, and an axial wall 19 about the periphery of the bottom portion and a radial outer flange 2%. The flange 2i) has circumferentially spaced apertures 21 therethrough, through which the axial projections l2, 13 of the anchor ring extend are bent to retain the parts in assembled relation.

To provide for mounting the brush units 10 on a shaft or arbor with the center plane of the unit oblique to the axis of the arbor, the central anchor ring ill is formed with a central opening 22 of elliptical shape symmetrical to the ring on the two principal axes of the ellipse, the

ellipse corresponding to a section of the arbor taken at the angle of obliquity desired. Similar elliptical openings 23, 24 are provided through the bottom of the side rings, but with the centers of the elliptical openings 23, 24- eccentric to the center of the anchor ring in opposite directions by the same amount of eccentricity and the major axes of the three elliptical openings all parallel. In other words, the elliptical openings in the side rings are olfset by the same amount in opposite directions to provide a bore oblique to the central plane of the brush unit and adapted to conform to a round shaft.

To provide for driving the brush units, on arbor 25 having a central portion 26 of a diameter to fit the brush units, reduced threaded portions 27, 24 at the ends thereof and journal portions 29, 3t! therebeyond are provided with a feather key 31 extending axially of its body portion 26. The brush units it) are formed with keyways 32, 33, 34 adjacent their elliptical center openings for engaging over the key. A pair of clamp collars 35, 36 are provided for sliding engagement over the body 26 and keys of the arbor. These keys are of wedge shape having one face normal to the axis and an opposite face at the desired oblique angle of the brush units. Nuts 37, 38 engage the threaded portions 27, 28 of the arbor and press the collars 35, 36 against t he brush units, locking the units in place.

The side discs 16, 17 have their hub portions cupped outwardly any desired distance to engage the hub portions of adjacent brush units and provide a free nar row annular space 39 between the bristles of adjacent brush units to permit freedom of flexure of the bristles of each unit independent of support of adjacent units thereby eliminating the need for spacers or collars in the brush. If sufficient strength and rigidity can be provided, the discs 16, 17 may be made from reenforced plastic or other suitable material.

Since the annular spaces are in planes oblique to the axis of rotation of the brush, every bit of surface of the door is covered by contact of the brush.

The brush unit it) is easily mounted upon a shaft or arbor and can only be positioned on a proper diameter arbor so as to retain its bristles spaced from the bristles of the adjacent brush unit so that an effective cleaning action can be secured.

Of course, any desired bristles may be used and they can be secured to the anchor ring, or disc frame, 11 in any conventional manner.

The brush units, when on a common shaft, are spaced for effective action due to the improved design of the metal stampings that act as spacers or colalrs and provide a novel, low cost, but practical method of construction.

Variations may be made without departing from the scope of the invention as it is defined by the following claims.

I claim:

1. A rotary brush unit for mounting on a cylindrical arbor with its central plane oblique to the axis of the arbor, said unit comprising an anchor ring for securing bristles and a pair of discs secured thereto and having hub portions spaced axially from the anchor ring on opposite sides thereof, all of said discs and ring having elliptical openings in alignment with each other axially of the arbor and with the axes of the openings being parallel to each other, said hub portions extending axially beyond any bristles carried by said anchor ring, to engage an adjacent brush unit of similar construction with the bristles of adjacent units axially spaced one from another when a plurality of the brush units are operatively assembled on a shaft.

2. A rotary brush unit for positioning on a cylindrical arbor comprising a center frame ring, bristle means secured to said center frame ring, a pair of side discs with cupped hub portions, and means securing said side discs to opposite surfaces of said center frame ring and with the hub portions spaced axially from said ring, said hub portions having arbor engaging apertures therein of elliptical shape positioned to engage an arbor about the entire circumference thereof and position the unit thereon obliquely with relation to the axis of the arbor, said hub portions extending axially beyond any projection of said bristle means to function as spacers in an assembly of the brush units.

3. Rotary brush means comprising a cylindrical 'arbor, a plurality of brush units mounted on said arbor with their central planes oblique to the axis of said aI-bor, and means for securing said brush units to said arbor, said units comprising an anchor ring lying in and defining a plane, a pair of discs secured to said anchor ring and having hub portions spaced axially from the anchor ring, all of said discs and ring having elliptical openings in alignment with each other on the longitudinal axis of said arbor and engaging axially spaced portions of said arbor, and bristle means secured to the peripheral portions of said discs and anchor ring and extending from said anchor ring and lying in the plane thereof, said hub portions protruding axially the farthest of any portions of said brush units to engage the hub portion of an adjacent brush unit or" similar construction and position the bristles of adjacent units in axially spaced relation.

4. Rotary brush means comprising a circular in section arbor, a plurality of brush units mounted on said arbor With their central planes oblique to the axis of the arbor, said units each comprising an anchor ring, a pair of annular discs secured to said anchor ring and having hub portions extending axially from and being spaced axially from the anchor ring, all of said discs and ring having elliptical openings in alignment with each other on the center axis of said arbor and with the major axes of said openings all being parallel, the elliptical openings in said discs being eccentric to the center axis of said anchor ring in opposite directions by the same amount of eccentricity, bristle means secured to each of said units at the peripheral portions of said discs and anchor ring, and means engaging said arbor at the ends thereof to secure said brush units thereto, said hub portions engaging the hub portion of an adjacent brush unit of similar construction.

5. Rotary brush means comprising a cylindrical arbor, a plurality of open centered annular brush units mounted on said arbor with their central planes oblique to the axis of the arbor, said units comprising an anchor ring, a pair of discs secured to said anchor ring and having hub portions extending axially from the anchor ring and spaced therefrom, all of said discs and ring having equal size elliptical openings the axes of which are parallel with each other and With the center axis of the said unit being obliqueto the plane of the anchor ring, and bristle means secured to each of said units at the peripheral portions of said discsand anchor ring, said hub portions portruding axially in the said units to engage the hub portion of an adjacent brush unit of similar construction, said elliptical openings'engaging the entire periphery of said arbor-at three axially spaced portions thereof.

6; Rotary brush means comprising a cylindrical arbor, a plurality of brush units mounted on said arbor with their central planes oblique to the axis of the arbor, said units comprising an anchor ring, a pair of sheet metal discs secured to said anchor ring and having hub portions spaced axially from all portions of the anchor ring,

all of said discs and ring having parallel elliptical openings therein in engagement with the entire periphery of said arbor, at axially spaced portions thereof, bristle means secured to each of said units at the peripheral portions of said discs and anchor ring, said hub portions protruding axially in the said units to engage the hub portion of an adjacent brush unit of similar construction and With the bristles of adjacent units being axially spaced one from another, and means securing said brush units to said arbor.

7. A rotary brush unit for mounting on cylindrical arbor with its central plane oblique to the axis of the arbor, said unit comprising an anchor ring, bristle means carried by said anchor ring, and a pair of formed side discs flanking said anchor ring and aiding in securing said bristle means thereto, said side discs having axial-1y out Wardly directed hubs of desired length with elliptical arbor-engaging bores therein adapted to engage the en tire circumference of an arbor of predetermined diameter and position the brush unit with its center plane obliquely to the arbor axis, said elliptical arbor engaging bores having axes that are parallel to each other and with the center axis of said unit being oblique to the plane of said anchor ring, said hubs protruding axially beyond said bristle means and With hubs of adjacent brush units contacting each other when positioned on an arbor to space the bristle means of such brush units axially.

8. A brush Wheel assembly comprising a pair of disc elements fastened together in face-to-face relation, at least one of said disc elements having a generally planar central portion ofiset axially from the plane thereof in a direction away f om the other disc element, bristle means gripped between marginal portions of said disc elements and extending generally radially outwardly therefrom, each said disc element having a hole of the same general size and shape extending therethrough, each said hole being located eccentrically With respect to the center of the disc element With the hole in one disc element being diametrically opposed and similarly oriented with respect to the hole in the other disc element, the amount of eccentricity of said holes being equal, and the amount of eccentricity of each hole being less than the transverse dimension of the hole in a direction radially oi the disc element through the center or" the hole.

9. A rotary brush Wheel assembly comprising an an chor ring, bristles carried by said anchor ring, and a pair of discs secured to said anchor ring and having hub portions spaced axially from the anchor ring on opposite sides thereof, all of said discs and ring having holes of the same generally size and shape extending therethrough, each said hole in said disc being located eccentrically with respect to the center of the disc and with the hole in one disc being diametrically opposed and similarly oriented with respect to the hole in the other disc element, the amount of eccentricity of said holes in said discs being equal and the amount of eccentricity of each hole being less than the transverse dimension of the hole in a direction radially of the disc through the center of the hole.

References Qited in the file of this patent UNITED STATES PATENTS 

8. A BRUSH WHEEL ASSEMBLY COMPRISING A PAIR OF DISC ELEMENTS FASTENED TOGETHER IN FACE-TO-FACE RELATION, AT LEAST ONE OF SAID DISC ELEMENTS HAVING A GENERALLY PLANAR CENTRAL PORTION OFFSET AXIALLY FROM THE PLANE THEREOF IN A DIRECTION AWAY FROM THE OTHER DISC ELEMENT, BRISTLE MEANS GRIPPED BETWEEN MARGINAL PORTIONS OF SAID DISC ELEMENTS AND EXTENDING GENERALLY RADIALLY OUTWARDLY THEREFROM, EACH SAID DISC ELEMENT HAVING A HOLE OF THE SAME GENERAL SIZE AND SHAPE EXTENDING THERETHROUGH, EACH SAID HOLE BEING LOCATED ECCENTRICALLY WITH RESPECT TO THE CENTER OF THE DISC ELEMENT WITH THE HOLE IN ONE DISC ELEMENT BEING DIAMETRICALLY OPPOSED AND SIMILARLY ORIENTED WITH RESPECT TO THE HOLE IN THE OTHER DISC ELEMENT, THE AMOUNT OF ECCENTRICITY OF SAID HOLES BEING EQUAL, AND THE AMOUNT OF ECCENTRICITY OF EACH HOLE BEING LESS THAN THE TRANSVERSE DIMENSION OF THE HOLE IN A DIRECTION RADIALLY OF THE DISC ELEMENT THROUGH THE CENTER OF THE HOLE. 